Where is Kotlin Native doing great?
Right now I wouldn't consider it for anything serious.
EDIT: Regarding Fuchsia, I only mean user space apps. The other layers are a mix of Rust, Go and C++ (C leftovers seem to be being migrated to C++).
I don't believe that's strictly true. Different parts of Fuchsia use different technologies. Flutter is (as far as I remember) the only UI framework for Fuchsia right now, so UI on Fuchsia is written in it (which uses Dart).
If Google plays an Android/Android Things on Fuchsia there won't be much use of C++ for app developers.
If Google plays an Android/Android Things on Fuchsia there won't be much use of C++ for app developers.